USGS Volcano Hazards Program Volcano Update

CVO update page and observatory web site

Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon.

Recent Observations: Monitoring systems show that activity at the Cascade Range volcanoes during the past week remains at background levels. A few recent earthquakes are worth noting, however. On January 30, a M3.7 earthquake struck the Chelatchie Prairie area northeast of Amboy, WA, and was widely felt in the Portland-Vancouver area. Small aftershocks (M0.9 and M0.6) struck the same area shortly thereafter. Later that same evening, a M2.6 earthquake struck the Mount St. Helens area near Johnston Ridge Observatory. The quake depths ranged from 5 to 15km. Such earthquakes are not atypical for this area. At Newberry volcano two small earthquakes occurred: a M0.7 struck on January 26 and a M1.0 struck on January 27. Both were located slightly northwest of the caldera and ranged in depth from 6 to 8 km.

The U.S. Geological Survey Cascades Volcano Observatory and the University of Washington continue to monitor the Washington and Oregon volcanoes closely and will issue additional updates and changes in alert level as warranted.

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Update in Common Alerting Protocol (CAP) format